Analysis of stress and deformation of a positive buried pipe using the improved Spangler model

Tian, Yong; Xue, Jiang; Yu, Rangang

doi:10.1016/j.sandf.2015.04.001

Cited by 24 publications

(11 citation statements)

References 7 publications

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“…As shown in Figure 4, the deformation of a pipeline can be calculated using the Code for Design of Oil Transportation Pipeline Engineering (GB50253-2003) [35] and the Spangler Formula [36,37].…”

Section: The Strains On a Buried Long Pipelinementioning

confidence: 99%

Experimental and Numerical Study on the Strain Behavior of Buried Pipelines Subjected to an Impact Load

et al. 2019

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Long-distance oil and gas pipelines are inevitably impacted by rockfalls during geologic hazards such as mud-rock flow and landslides, which have a serious effect on the safe operation of pipelines. In view of this, an experimental and numerical study on the strain behavior of buried pipelines under the impact load of rockfall was developed. The impact load exerted on the soil, and the strains of buried pipeline caused by the impact load were theoretically derived. A scale model experiment was conducted using a self-designed soil-box to simulate the complex geological conditions of the buried pipeline. The simulation model of hammer-soil-pipeline was established to investigate the dynamic response of the buried pipeline. Based on the theoretical, experimental, and finite element analysis (FEA) results, the overall strain behavior of the buried pipeline was obtained and the effects of parameters on the strain developments of the pipelines were analyzed. Research results show that the theoretical calculation results of the impact load and the peak strain were in good agreement with the experimental and FEA results, which indicates that the mathematical formula and the finite element models are accurate for the prediction of pipeline response under the impact load. In addition, decreasing the diameter, as well as increasing the wall thickness of the pipeline and the buried depth above the pipeline, could improve the ability of the pipeline to resist the impact load. These results could provide a reference for seismic design of pipelines in engineering.

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Section: The Strains On a Buried Long Pipelinementioning

confidence: 99%

Experimental and Numerical Study on the Strain Behavior of Buried Pipelines Subjected to an Impact Load

et al. 2019

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“…The FE method has been found to pro vide more re li able re sults during the per for mance test ing of buried pipes than tra di tional em pir i cal ap proaches (Jung et al, 2014;Zhou et al, 2017). The FE method is con ve nient tools for study ing the be hav iours of buried flex i ble pipes and avoid ing the sub stan tial costs of field tests while in spect ing many sce nar ios and test ing a va ri ety of fac tors that in flu ence the be hav iours of buried pipes (Tian et al, 2015;Tsai et al, 2014). How ever, the ac cu racy of the FE re sults de pends on the se lec tion of an ap pro pri ate 4…”

Section: Fe Modelmentioning

confidence: 99%

Investigation of the structural performance of two flexible pipes set in one trench with a new placement method for separate sewer systems

Abbas

Ruddock

Alkhaddar

et al. 2019

Tunnelling and Underground Space Technology

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Sub stan tial re search has been con ducted on sin gle flex i ble pipes buried in a trench. In con trast, the ob jec tive of this study is to de ter mine the struc tural per for mance of two buried flex i ble sewer pipes po si tioned one over the other in a sin gle trench. An in no v a tive con fig u ra tion is de signed, based around the use of an in no v a tive manhole struc ture which can ac com mo date both foul and sur face wa ter, to solve the chal lenges as so ci ated with construct ing sep a rate sewer sys tems in nar row streets while pro vid ing ad di tional space for other in fra struc ture services. The be hav iours of the two flex i ble pipes were tested us ing a 3D fi nite el e ment (FE) model val i dated with ex per i men tal data from a lab o ra tory in ves ti ga tion. A mod i fied Drucker-Prager cap soil con sti tu tive model was used to sim u late the elasto-plas tic soil be hav iour. The re sults show that this ap proach com pris ing the use of a large-di am e ter flex i ble pipe set above a small-di am e ter flex i ble pipe mit i gates the strain on the smaller pipe and de creases the to tal de flec tions of both pipes and the soil.

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“…The study of the interaction between buried pipes and the soil around the pipes relies on indoor tests as well as numerical simulations. Tian et al use a new formulation derived from the improved Spangler model to improve the accuracy of stress and deformation calculations for orthotropic buried pipes and demonstrate that the new model can simulate the behaviour of buried pipes better than the Spangler model [7]. Khademi-Zahedi uses the finite element method to evaluate the behaviour of buried medium density polyethylene (MDPE) pipelines where damage occurs at the crown.…”

Section: Introductionmentioning

confidence: 99%

Coupling Interaction of Surrounding Soil-Buried Pipeline and Additional Stress in Subsidence Soil

Ding

Yang

et al. 2021

Geofluids

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In the process of underground resource exploitation, the induced surface subsidence easily leads to the deformation and failure of buried pipeline. And in the process of soil subsidence, the complex interaction between buried pipeline and surrounding soil occurs, which leads to deformation and additional stress in buried pipeline. In this paper, a laboratory test system is designed and developed to analyze the influence of buried depth, cohesion of soil, and angle of internal friction on stress, in order to obtain the deformation mechanism of pipe-soil and the pressure around the pipe and the distribution of additional axial stress along the pipeline. The research results show that in the process of subsidence, the synergistic deformation between the pipe and soil at both ends of the subsidence area is maintained, while there is a compressive nonsynergistic deformation zone in the soil at the top of the pipe, and the deformation zone in the cohesion-less soil and the cohesive soil presents a spire shape and an arch shape, respectively. Areas of maximum additional tensile and compressive stresses occur in the area of maximum curvature and the central position. In addition, the smaller the burial depth, the earlier the unloading phenomenon occurs; and the additional stress in buried pipe in cohesion-less soil is significantly less than that in cohesive soil, and the unloading phenomenon occurs earlier. The research results provide the basis for disaster prevention of buried petroleum transmission pipeline in subsidence process.

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Analysis of stress and deformation of a positive buried pipe using the improved Spangler model

Cited by 24 publications

References 7 publications

Experimental and Numerical Study on the Strain Behavior of Buried Pipelines Subjected to an Impact Load

Experimental and Numerical Study on the Strain Behavior of Buried Pipelines Subjected to an Impact Load

Investigation of the structural performance of two flexible pipes set in one trench with a new placement method for separate sewer systems

Coupling Interaction of Surrounding Soil-Buried Pipeline and Additional Stress in Subsidence Soil

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